Evaporator



May 19, 1931. D. G. ELLI 1,805,762

" EVAPORATOR l Filed March 21, 192

INVENTOR ATTORNEYS.

P ented Ma 19, 1931;

- UNITED ST T non a. mis, nnrnorr,

PATENro FicE:

or nn'rnorr, mrcnrenn, 'AssIeNon. T0 xnnvnra'ron. CORPORATION, or MICHIGAN, nconrorwrron or moment EVAIORATOB Application filed March 21,

This invention relates to mechanical ref rlgeratlng apparatus, and more particularly to evaporators. i

An object of my irrvention is to increase the efliciency of refrigerating systems of the flooded type by providing the eva orator with means for conducting the gasihed rethe vapor space ata point frigerant from plane of the reremote from the vertical 0 frigerant inlet.

Another object of the invention is to pro;-

vide an evaporator with detachable means through which gasified refrigerant is conducted from the interior thereof to an ex .5 terior return conduit.

These and other objects will appear more in detail in the following description of an embodiment of my invention.

In the accompanying drawings:

50 Fig. 1 is a side elevational view partially insection illustrating an evaporator incorporating an embodiment of-my invention .Fig. 2 is a fragmentary end elevational' view of the same; and I 35 Fig. 3 is a sectional View of the evaporator taken on line AA of Fig. l.

Referring now to the drawings by characters of reference, 10 represents a vessel or header adapted to contain a body of liquid refrigerant and oil in solution. The header is preferably formed of a cylindrical shell which is provided at one end with a permanently attached closure 11 and at the other endwith a detachable closure plate 12, the plate 12 being secured by the detachable screws 13 to the ring 9 which'is secured to the end of the shell. A plurality of depending pipe loopsl l forma part of the evaporator, the ends of the pipe loops being secured to and extending into the header open communication with the liquid con-,

tained therein. .v

The detachable end closure plate 12 is provided with openings through which refrigerant enters and leaves the header, the lower opening 15 serving asthe inlet while the upper opening 16 serves as the outlet. Valve mechanism 17 is carried by the removable end plate and operates automatically to control the liquid refrigerant entering the header inlet opening, because in inlet opening refrigerant leaving the evaporator is taken from the header The end of the tu 1928; Serial 110,263,503.

anism includes a float,

type fully described in Patent-1,615,406 issued January 25, 1927 to J. R. Replogle.

' With structures of the character illustrated in the Replogle patent, considerable un-' gasified refrigerant enters the outlet opening, resulting in reduced efliciency. This condition results from located in the same vertical plane with the such plane intense agitation takes place due to the entrance of the liquid refrigerant into the body of warmer refrigera t the evaporator causing liquid refrigerant to be projected into the vapor space adjacent the outlet opening.- In

order to overcome this'condition and increase 7 the efficiency of the system, I provide an outlet tube 18 which is of a length sufficient to place the open end 19 thereof in a vertical plane which is remote from that in which'the is located. In this manner the from a point in the vapor space which contains the least moisture.

the outlet tube 18 extends through the outlet opening 16 to the exterior of the header. The

refrigerant, preferably S0 is of. greater specific gravity than the oil which travels in circuit therewith, and the liquid in the header will separate into two layers,'the upper layer 20 containing a'greater amount of oil-than the lower layer 21. .The t be 18 is provided with an opening 22 adjacent the constantly maintained upper header, so that oil will chain by gravity into the outlet tube from the upper layer and Wlll The other end of level of the liquid in the 7 through the inlet opening. S uch valve inephthe position of which the outlet opening being thus automatically maintain a constant quantity of oil in theheader.

The outlet tube is arranged and secured so that it can be readily and separately removed 6 rojecting exteriorly of the end closure p ate has integrally secured thereto aflange 23which interfits with and seals against a "complementa'ry surface formed on the removable" end plate. 'A fitting 24 interfits with the outer end of the flange 23 and detachable studs 25 are utilized to secure the fitting and the flange to the end plate. A refrigerant return conduit 26 is attached to the fitting 25, and a refrigerant feed conduit 27 is secured to a fitting 28 which is screwed into the inlet opening 15 in By removing the studs-25, the fitting and flange can be detached from the end plate, and the outlet tube 18 can be pulled through the outlet opening in the removable end plate. 'With this construction the outlet tube can be readily removed and inserted Without removing the end plate .or disturbing the valve mechanism.

Various changes can be made in the details of construction described Without departing from the spirit of my invention or the scope of What is claimed.

What I claim is 1. In a mechanical refrigerating system,

. a refrigerant evaporator provided with a head formed therein,

.tube secured at one end in having refrigerant inlet a float valve mechanism for controlling the admission of refrigerant liquid through said inlet opening, a flange collar disposed externally of the head adjacent the outlet, opening, a refrigerant fluid outlet the flange collar and projecting through the outlet opening formed in ,the head into the interior of the evaporator, and means for securing the flange collar rigidly. to the head.

2. In a .mechanical refrigerating system, a refrigerant evaporator provided with a head having inlet and outlet openings formed therein, means associated with the mlet opening for admitting a predetermined quantity of refrigerant liquid to the evaporator, and .a refrigerant fluid outlet tube detachably secured externally of the evaporator and projecting through the aforesaid outlet opening into the interior thereof.

3. In a mechanical refrigerating system an evaporator having a removable head provided with refrigerant inlet and outlet openings, means for maintaining a relatively constant level of liquid refrigerant therein, and

a removable outlet tube projecting into the evaporator through the outlet opening, said tube having an opening therein remote from the removable head and in a plane above the level of the liquid refrigerant.

In testimony whereof I have aflixed my signature.

' DON G. ELLIS.

the removable end closure plate.

and outlet openings 

